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TDOT I-40/I-240 Interchange, Phase II

Geotechnology, a UES Company, worked on Phase II of the I-40 and I-240 Interchange which included the construction of a four-level interchange that improved traffic flow for east and westbound traffic. The additional ramps help with traffic congestion and improve safety on the interchange and help alleviate congestion for the surrounding routes as well.

Several of the retaining walls had to be seismically designed. To do this, Geotechnology recommended the use of geofoam as backfill behind one of the walls to reduce the seismic lateral pressure, and performed a post-pile driving liquefaction assessment using Cone Penetration Testing to see the improvement in soil liquefaction resistance due to pile driving causing soil densification.

Geotechnology’s services included:

  • Geotechnical subsurface exploration
  • Site specific seismic studies
  • Deep foundation recommendations
  • Pavement recommendations
  • Site preparation recommendations
  • Stability analysis of slopes
  • Design of reinforced earth (bridge abutment) slopes to meet the seismic requirement
  • Mechanically stabilized earth (MSE) wall analysis and recommendations. A total of 23 walls are included in this project

Geotechnology, a UES Company, also handled the Construction Engineering and Inspection (CEI) duties during construction. Services included:

  • Performing retaining wall design review
  • Dynamic testing of deep foundations
  • Providing geotechnical support during construction
  • Performing various construction-related laboratory tests
  • Attending weekly meetings and performing general geotechnical-related duties



Shelby County, Memphis, Tennessee


Materials Testing

Geotechnical Engineering